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Whatspp/Phone:
+8618666402929
Email:info@shinysteeljewelry.com
Factory address:
No. 5 Changsheng Road, Chang’an Town, Dongguan City, Guangdong Province, China.
In international body jewelry manufacturing, precision is everything. While the US market orders in AWG (Gauge) and Inches, our CNC machines operate on strict metric (Millimeter) tolerances. Here are the exact conversion charts our engineers use to ensure your tech packs are translated into flawless physical products with +/- 0.05mm accuracy.
| Gauge (AWG) | Millimeters (mm) | Inches (Decimal) |
| 20G | 0.8mm | 0.032″ |
| 18G | 1.0mm | 0.040″ |
| 16G | 1.2mm | 0.047″ |
| 14G | 1.6mm | 0.063″ |
| 12G | 2.0mm | 0.081″ |
| 10G | 2.4mm | 0.102″ |
| Millimeters (mm) | Inches (Fraction) |
| 6mm | 1/4″ |
| 8mm | 5/16″ |
| 10mm | 3/8″ |
| 12mm | 15/32″ (or 1/2″ approx) |
| 16mm | 5/8″ |
| 19mm | 3/4″ |
A common mistake in the industry is measuring the entire length of the jewelry. As precision manufacturers, we measure strictly by the ‘Wearable Area’ to ensure anatomical safety.
Measure the straight-line distance between the inner bases of the two ends (balls/discs). Do not measure the threads, and do not measure along the curve of a belly ring.
Always measure the Inner Diameter (ID). This is the widest straight-line distance across the inside of the ring. Measuring the outer diameter will result in jewelry that pinches the cartilage.
Measure the diameter of the center wearable shaft. For Double Flare Tunnels, do not measure the flared outer lips, as they are typically 1.5mm-2.0mm wider than the actual gauge size to keep the jewelry in place.
Stocking the wrong sizes leads to dead capital. Based on global sales data from thousands of piercing studios, here are the industry-standard dimensions for specific body parts, along with our expert advice on how to structure your wholesale inventory.
A size chart is useless if the factory cannot execute it. In the piercing world, a ‘rough estimate’ causes micro-tears and infections. Here is why professional brands trust our manufacturing tolerances over cheap market alternatives.
Cast jewelry shrinks unpredictably (1-2%) during cooling. We CNC-machine our titanium and steel posts from solid wire. This guarantees a strict tolerance of +/- 0.05mm, ensuring the jewelry glides through the piercing channel flawlessly.
We measure the exact ‘wearable shaft’—strictly excluding the threads, the base, or the decorative top. This ensures that a 6mm labret provides exactly 6mm of space for the tissue, preventing embedding or pinching.
This is the biggest headache for brands mixing suppliers. We adhere to universal tapping standards. Our 14G internally threaded posts use a 1.2mm thread pattern, and our 16G/18G posts use a 0.9mm thread pattern. Your customers can mix and match our decorative tops with posts from other major premium brands seamlessly.
From measuring inner diameters to custom gauge requests, here are the detailed answers to the top 10 technical questions we receive from procurement managers.
For circular barbells, CBRs, and clickers, the size is always measured by the Inner Diameter (ID)—the widest straight-line distance across the inside of the ring. We ensure this inner diameter is exact to prevent pinching the septum or cartilage.
To maintain CNC calibration efficiency, our MOQ is 100 pieces per specific size and style. For example, 100pcs of 16G/6mm and 100pcs of 16G/8mm. This low MOQ allows you to build a comprehensive size run without massive capital.
Yes. Because we use CNC lathes rather than fixed molds for our posts, we can easily program the machines to produce “in-between” or odd lengths (e.g., 7mm labrets) to cater to specific anatomical needs, with zero extra tooling fees.
YNo. Our PVD (Physical Vapor Deposition) coating is applied at a microscopic level (typically 0.5 to 2.5 microns). It provides vibrant color and durability without altering the functional gauge or the smoothness of the threading.
In the body jewelry industry, 5/16 of an inch is universally accepted as the equivalent of 8mm (technically it is 7.93mm). Our CNC machines are calibrated to the exact metric millimeter (8.00mm) for absolute precision.
The length of a curved barbell is measured as the straight-line distance between the two ends of the barbell (from the base of the top thread to the base of the bottom thread), not along the curve of the metal.
Yes. We manufacture our threadless posts with a standard 25G (0.45mm) hollow opening. This ensures they are compatible with the vast majority of professional threadless decorative ends on the market.
Yes, we specialize in large-diameter machining. We can manufacture ear tunnels and plugs up to 50mm (2 inches) and beyond, maintaining strict weight control to prevent earlobe thinning.
A Standard lobe piercing done with a gun is typically 20G (0.8mm) or 22G (0.6mm). However, professional lobule piercings are usually done with 18G (1.0mm) or 16G (1.2mm) needles for better stability and healing.
Yes. To simplify your inventory management and fulfillment process, we clearly label every bulk bag or individual blister pack with both the Gauge (e.g., 14G) and the Millimeter (e.g., 1.6x10mm) specifications.
